Valve



- Sept- 17, 1929- I J. H. cooK 1,728,855

VALVE Filed June l5. 1927 Patented Sept. 17, 1929 The present invention relates to valves of the type disclosed in my Patent No. 1,691,626, filed September 29, 1926.

The object is to'provide novel and simple means whereby a valve o r a valve seat that becomes worn or distorted from any cause can be removed without shutting olf thel fluid to the valve casing.

In the accompanying drawings:

Figure 1 is a vertical longitudinal sectional view through a valve structure embodying the present invention,

Figures 2, 3 and 4 are sectional views on the lines 2-2, 3-3 and 4 4: respectively of Figure 1.

the threaded ends of pipes or the like. An integral bridge 7 extends across this passageway and has a port 8 opening therethrough. Into this bridge are threaded oppositely faced valve seat elements 9 that are thus removable,

their inner ends being spaced apart and their outer ends preferably interiorly beveled, as shown at 10 to rovide seating surfaces.

Valves, pre erabl of the ball type, and shown at.11, are a apted to engage the respective valve seats. These valves are held in predetermined spaced relation by a spacer rod 12 that extends through the valve seat members and port 9, and preferably is angular in cross section, so as to allow the free passage of fluid through the valve seat elements and port.

The valve casin has oppositely outstanding nipples 13 an 14. The nipple 13 is in? teriorly threaded, and screwed thereinto is a valve cage 15 that abuts against the lower valve seat element 9 and contains at its inner end the'lower valve 11. This valve cage is provided with lateral ports 16 through which the fluid can pass. The outer end of the valve cage has a plug 17 screwed thereinto and interposed between the inner end of said plug and the lower valve 11 is a coiled spring 1S that serves to urge the lower valve 11 to its seat and through the instrumentality of the spacer 12 urges the upper valve 11 away from spring 18 to a=positio11ba kg the valve 11. It thus determines the amountof .nievement said valve may have away romi'ts seti The outer ends of tlleaplllg,1.7.= mld blllmellt screw 19 aswell as the outer,;endof, ,t`he valve cage 15 arek enclosed ,gbygajfgholocl 20that is tlreaded onto the exteriorpffthe wernip: P e 13. f; f l i mi" A guide member 2.1,.isthneadedante theel?- per end of the uppergnipple; ylsand,carries, an outwardly vextending guard; sleeve 22.5 i 'Ihis guide member has an opening 23 infitsl Linner end that is gangular;fmecrossl-fsetonplunger stem" 2 4 :isamountedl to 4lueciprecate in the guide fmember,-and 11215.21!Langzi/ilar portion 25 slidable in v`,the angular-.reopening 23. The inner lend lofthe {guidestemf Jbearsmpon the upper valve 1.11-, andgaispning,ZasurroundL ing said innerend, .bearsiu-pon the upper kvalve 11 and against aliange27 formed oli-,the stem 24. The steml passes through,n .packinggland 28 located within, theguide member, and ithe. upstanding guard sleeve 22 containsa coiled spring 29 that bearsagainst ahead 3Q located on the upper endof ylsaidguidef stem,= 1 7 ,-g

The operation.I of thestructuregis; substantially as follows.-,-Assuming'5 ccindu'its,= -\,a're connected to thevalve. casing, so .that` liquid will flow in the direction fill'dcatedvfby, hearrows in Figure, 1, y'it Willi g understood that. as long as the `springJS fllgwedftoi act, it will hold th lower yalveflliseated; thusut; ting o' communiationgbetaveen)hatends 0f the passageway 1 6,-,throughf` saidf casing, 1:and preventing they flow of uidif;I If theheadfO is ressed inwardly, theA upper, valve yl1 Tis moved downwardly',l thus Aforcing the` spacer; 12 down,- wardly and unseating .the lower valve 11. aAs a consequence the fluid; can L flow through, ,the valve casin` fbut-` the .upper :valve-:11, cannot seat itself V. ecause'- ordinarilythe abutment screw 19 is sopositionedthat. it willstopthe downward movementv of the two gvalvesjbefore the upper valve 11'seatsitselffonthefupper valve "seat'lmfi ma? .ma

In case the lower valve; seat 10 on thee-lower valve 11 becomes worden-misshapenorleaky from any cause and it is desired to examine 100 .wils

or replace the parts, if the abutment screw 19 is lowered suiciently and the upper plunger is pressed downwardly, the upper valve 1l may be seated, thus cutting off the flow of fluid. The lower parts can then be removed, and the valve and spacer detached, the spring 26 and the pressure of the liuid serve to hold the-upper valve closed and thus permitting the detachment of all the lower parts, including the lower valve seat and valve.

From the foregoing, it is thought that the construction, operation and many advantages of the herein described invention will be apparent to those skilled in the art, without further description, and it will be understood that various changes in the size, shape, proportion and minor details of construction may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention.

What I claim is: v

1. A valve structure comprising a casing having a port, separately removable valve seats at opposite ends of the port, oppositely operating valves for the respective seats, means in the casing, and operating oppositely against the valves for moving them to their seats one of said means being manually operable, and a spacer interposed between the valves.

2. A valve structure comprising a casing having a port, valve seats at opposite ends of the port, oppositely operating valves for the respective seats, separate means in the casing, and operating oppositely against the valves for moving them to their seats, one of said valves and the valveseat with which it cooperates being removable while the other valve and valve seat remain imposition, and a spacer between the valves that is also removable.

3. A valve structure comprising a casing having a bridge, said bridge being provided with a port, separate detachable valve seats carried by the bridge, valves on opposite sides of the bridge that cooperate with the seats, a spacer between the valves passing through the ports, a plunger mounted inthe casing and bearing against one of the valves for moving said valves and spacer in one direction, spring means detachably mounted in the casing and bearing against the other valve for moving said valves and spacer in the opposite direction, and a detachable closure holding the spring in place, said closure when detached permitting the removal of the spring and thereby the removal of one of the valves and permitting the seating of the other valve.

4. A valve structure comprising a casing having a port and valve seats on opposite sides of the port, one of the seats being removable independently of the other, valves that are movable into and out of cooperative positions on the seats, the valve that cooperates with the removable seat being also re- 

